Agencia Estatal de Meteorología

Agencia Estatal de Meteorología
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    13883 research outputs found

    Evidence for the role of the diabatic heating in synoptic scale processes: a case study example

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    The quasigeostrophic theory is used to address the role of diabatic forcing in synoptic scale processes over Iberia. A parametrization of diabatic heating is obtained in terms of a thermodynamic variable called the ice-liquid water potential temperature which is conservative under all phase changes of water. A case study objectively selected by means of a rotated principal component analysis over the diabatic field is analyzed to test the proposed parametrization. This study highlights the fact that the magnitudes of diabatic forcing and dynamic forcing are very nearly the same throughout the troposphere. The results also show that the composite diabatic heating is a better representation for both cloudiness and precipitation fields than the dynamic forcing

    Preliminar results on the operative cosine correction in EUBREWNET

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    Póster elaborado para el Quadrennial Ozone Symposium celebrado en Edinburgh los días 4–9 de septiembre de 2016

    Mediterranean cyclones in a changing climate. Results from JMA-GSM model

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    Póster elaborado para la 11th PLINIUS Conference in Mediterranean Storms celebrada del 7 al 11 de septiembre de 2009 en Barcelona.This work has been framed within the MEDEX project, and has had the support from MEDICANES/CGL2008-01271/CLI project, from Spanish Ministerio de Ciencia e Innovación

    Catalogation of cyclones in the Western Mediterranean

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    Ponencia presentada en: INM/WMO International Symposium on Cyclones and Hazardous Weather in the Mediterranean celebrado en Palma de Mallorca, del 14 al 17 de abril de 1997

    Aerosol scenario effect in elastic lidar data inversion for lidar ratio estimation: a case study over a coastal dust-influenced area

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    Comunicación presentada en: V Reunión Española de Ciencia y Tecnología de Aerosoles – RECTA 2011 celebrada del 27 al 29 de junio de 2011 en CIEMAT, Madrid

    GPS data recommendations for European Numerical Weather Prediction

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    Informe del proyecto TOUGH: Targeting Optimal Use of GPS Humidity Measurements in Meteorology.TOUGH is a shared cost project, co-funded by the Research DG of the European Commission, within the RTD activities of the Environment and Sustainable Development sub-programme, contract no EVG1-CT-2002-00080

    A study on the forecast quality of the mediterranean cyclones

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    Comunicación presentada en: 4th Plinius Conference on Mediterranean Storms celebrada del 2 al 4 de octubre de 2002 en Palma de Mallorca.The main general objective of MEDEX is stated to be the improvement of knowledge and forecasting of cyclones that produce high impact weather in the Mediterranean area. So, for this scope one of the intermediate goals of the project concerns the development of an objective method to evaluate the quality of the forecast of the cyclones. The topic of the present study is to investigate the cyclone's forecast errors in that area and to propose an objective methodology to quantify them. An investigation on the performance of the HIRLAM(INM)-0.5 model in the forecast of cyclonic centres has been done. Databases of analysed and forecasted cyclones for the Western Mediterranean have been used in this study. The "distance" between the analysed and forecasted cyclone has been measured calculating the differences in the value of the parameters chosen to describe them at the sea level surface. Results on the characteristics of the errors are shown. An index constructed by means of these differences has been introduced to evaluate the ability of the model forecasting cyclones, and to quantify it. From this index, two others indexes have been derived in order to discriminate if the forecast has overestimated or underestimated some magnitudes in the description of the cyclone. Three different time forecast ranges, H+12,H+24 and H+48, have been considered to investigate temporal trend in their quality. Finally, to check this methodology, it has been applied to some MEDEX cases

    SINOBAS, a tool for collaborative mapping applied to observation of “singular” weather phenomena

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    Póster presentado en: 15th Annual Meeting of the European Meteorological Society (EMS) /12th European Conference on Applications of Meteorology (ECAM) celebrado en Sofia, Bulgaria del 7 al 11 de septiembre de 2015SINOBAS stands for the Spanish words for “System for reporting singular atmospheric observations” and is also a tribute to one of the first scientifics involved in studying the atmosphere in Spain, D. Manuel Rico y Sinobas, who lived in the 19th century. The system is aimed to facilitating citizens collaboration in reporting weather events that we have named as “singular”, meaning local (not extended over a wide area), infrequent (not happening frequently), of significant intensity and with a potential to cause high social impact. The tool is a Volunteered Geographic Information (VGI) system, based on Google maps, where citizens help to building a data base of weather phenomena like tornadoes, water spouts, funnel clouds, gustnados, dust devils, downbursts, gust fronts, heat bursts, slope winds, severe hail, flash floods, heavy snowfall, snow avalanches, freezing rain and unusual maritime phenomena like local raisings of sea level. The system is of particular interest for amateur meteorologists, and is a good example of what is called “citizen science”. SINOBAS not only permits to consult the data and to incorporate new reports, but in parallel the system maintains a twitter account that provides a very promt communication channel with the public. This last tool is of particular interest for nowcasting, because it can provide our forecasters a very fresh and enthusiastic input about existing weather conditions, particularly when significant weather phenomena happen

    Atmospheric particle size distributions in the Spanish Network of Environmental DMAs (REDMAAS)

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    The present work is a first approach to the study of the spatio-temporal variability of the submicrometer atmospheric aerosol in Spain. The aerosol measurements have been obtained simultaneously at seven monitoring stations that compose the REDMAAS network during two measurement campaigns corresponding to summer and winter seasons. In both summer and winter periods those measurement stations with a direct influence of anthropogenic emissions recorded the highest concentrations of particle number. In the summer campaign, the average daily pattern of the aerosol size distribution in the traffic and background urban stations was conditioned by the traffic emissions and secondary aerosol formation through photochemical reactions (new particle formation events, NPF). However, the secondary aerosol had a higher contribution to the aerosol total number concentration in the rural background and high-altitude stations. In the winter campaign, in all sampling sites with the exception of Izaña station, the traffic and domestic activity emissions had a greater contribution than secondary aerosol formation on particle number total concentration. New particle formation events were identified at all sites during the summer period, and at sites without direct influence of anthropogenic emissions during the winter campaign. Some aerosol shrinkage processes were also observed at the Madrid and El Arenosillo stations.This work has been financed by the Ministry of Science and Innovation (CGL2011-15008-E, CGL2010-1777, CGL2011-27020, CGL2014-52877-R & CGL2014-55230-R), Xunta de Galicia (GRC2013-047 potentially cofounded by ERDF) and the European Union Seventh Framework Programme (FP7/2007–2013) ACTRIS under grant agreement no. 262254


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